Archery bowsight

ABSTRACT

An archery bow sight assembly constructed with sections of heat shrinkable tubing mounted on a wire filament. The use of heat shrinkable tubing as sighting indicators enables the indicators to be firmly secured to the wire at any position with the applicaiton of heat. Once secured, however, the indicators can be moved by grasping the section of tubing and applying sufficient force to break the bond for subsequent adjustment. After adjustment the section of tubing can again be heated and thereby firmly secured to the wire.

United States Patent 1191 Carella [111 3,811,195 May 21, 1974 ARCHERY BOWSIGHT [76] Inventor: Richard F. Carella, 35572 Strathcona, Mount Clemens, Mich. 48043 [22] Filed: Nov. 16, 1972 [21] Appl. N0.: 307,329

[52] US. Cl. 33/265 [51] Int. Cl. F4lg 1/46 [58] Field of Search 33/265, 254, 257, 258

[56] References Cited UNITED STATES PATENTS 3,234,651 2/1966 Rivers 33/265 3,308,540 3/l967 Dean i 33/265 3,389,695 6/l968 Roloff et al... 33/265 3,455,027 7/l969 Perkins 33/265 3,600,814 3/l97l Smith 33/265 Primary Examiner-Robert B. Hull Assistant ExaminerRichard R. Stearnsv Attorney, Agent, or Firm-McGlynn and Milton [5 7 ABSTRACT An archery bow sight assembly constructed with sections of heat shrinkable tubing mounted on a wire filament. The use of heat shrinkable tubing as sighting indicators enables the indicators to be firmly secured to the wire at any position with the applicaiton of heat. Once secured, however, the indicators can be moved by grasping the section of tubing and applying sufficient force to break the bond'for subsequent adjustment. After adjustment the section of tubing can again be heated and thereby firmly secured to the wire.

7 Claims, 4 Drawing Figures ARCHERY BOWSIGHT It is old to utilize an archery bow sight assembly that includes a plurality of beads on a filament as disclosed in US. Pat. No. 3,234,651. In this assembly different colored beads are vertically spaced along a filament that is held generally parallel to the bow by means of a support member. Each bead corresponds to a different bow to target distance. In other words, when the archer sights a particular colored bead on the target the bow will be at the proper elevation to produce the correct trajectory for hitting the target. A number of problems are encountered with this assembly. First of all, the beads are very difficult to move along the filament and the assembly must be loosened to allow a position change of the beads. Furthermore, the archer must have a reasonably good idea as to the distance between himself and the target and he must also remember which color bead corresponds to each bow to target distance. In other words, this bow sight has no range finding capabilities, it is difficult to adjust the beads along the filament and it is also a relatively complicated and expensive assembly to produce.

Archery bow sight assemblies that have range finding capabilities are well known in the art. The inventor of this invention has invented such an assembly as illustrated in US. Pat. No. 3,365,800. This patent discloses an assembly including a plurality of annular rings adjustably supported on a support body, these annular rings being of different diameters. It is well known that as one moves away from a target its apparent size decreases; thus, the reason for the different sizes of rings. The various rings correspond to the apparent sizes of a target when viewed from different distances. This device works very satisfactorily but it leaves a need for a range finding sight assembly which is very simple in construction so as to be easily and inexpensively manufactured, sold and used.

Accordingly, it is an object and feature of the instant invention to provide an archery bow sight assembly which is very simple in structure and relatively inexpensive by way of utilizing heat shrinkable tubing .which can easily be adjusted along the length of a filament.

It is another object and feature of this invention to provide such an improved bow sight assembly in which the heat shrinkable tubing frictionally engages the filament when exposed to heat but may be moved along the filament for adjustment in response to a predetermined force, after which it will again frictionally engage the filament in response to heat. I

In correlation with the foregoing objects and features, another object and feature of this invention is to provide heat shrinkable tubing of different lengths to act as range finders for the archer.

Other objects and attendant advantages of the present invention will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings wherein:

FIG. 1 is a fragmentary perspective view of a preferred embodiment of the bow sight assembly of the instant invention in combination with an archery bow and an arrow;

FIG. 2 is a front view of the preferred embodiment of the instant invention;

FIG. 3 is a side view of the preferred embodiment of the invention; and

FIG. 4 is an enlarged cross-sectional view taken substantially along line 4-4 of FIG. 2.

Referring now to the drawings, a bow sight assembly constructed in accordance with the instant invention is generally shown at and mounted on an archery bow 12.

The archery bow sight assembly 10 includes a support means generally shown at 14. The support means 14 includes an elongated guide member 16 and a bracket generally indicated at 18. The bracket 18 is slidably supported on the guide member 16. The bracket 18, as viewed in cross-section, includes a bottom 13 and a pair of hooked arms 15 extending therefrom, the hooked arms engaging or hooked around the guide member 16 as shown in FIG. 4. A screw 20 ex tends through and threadedly engages the bottom 13 of the bracket 18. The end of screw 20 is disposed in a cylindrical spacer 17 which is in turn urged against guide member 16 to frictionally hold the bracket 18 in any selected position along the length of the guide member 16. The guide member 16 includes means for attaching the assembly to a bow including ahole disposed adjacent each end of theguide member 16 for receiving a fastener 21 for securing the archery bow sight assembly 10 to the archery bow 12.

A length of filament 22 having the configuration of an elongated loop supports a plurality of heat shrinkable tubing sections or tubes 24. The sections of heat shrinkable tubing 24 are of different lengths and are in frictional engagement with the length of filament 22. The sections of heat shrinkable tubing 24 have annular color bands 25 encompassing each section of tubing 24. The bands are used for sighting in that they are aligned with the center of the target. The length of filament 22 that is in the shape of an elongated loop has two ends 28 that extend parallel to one another and perpendicularly or laterally away from the loop 22. The bracket 18 is designed to receive the perpendicularly extending ends 28 through a hole 30 in each arm 15 of the bracket 18 and therefore frictionally hold the loop onto the guide member 16. The bracket 18 holds the elongated loop 22 parallel to the guide member 16 and the bow 12. The filament 22 should be made of some stiff material; preferably a metal wire.

Each section of heat shrinkable tubing 24 has a different length, each length corresponding to an apparent target height as viewed from a particular distance. To use the device one would employ the following procedure: First, a target of a known dimension is selected. Next, the archer positions the sections of tubing along the length of the filament by testing the bow so that at each specified distance the vertical length of the section of tubing would equal the apparent vertical height of the target. The alignment of each section of tubing with the target causes the bow to be held at the proper elevation to give the proper trajectory to the arrow so that it hits the target. Having done this with all the sections of tubing the archer can then use the bow and sight to shoot and hit a target of comparable size without being required to know or guess the'distance between himself and the target.

An important feature of the invention is that the sections of tubing are adjustable along the length of the filament. When the archer determines the proper position for a section of tubing along the filament, he merely heats the tubing by suitable means. This causes the tubing to shrink and be frictionally engaged with the filament so that it cannot slide out of place. In the 7 event that the archer needs to reposition one of the sections of tubing he can do so by grasping the tube in question and applying sufficient force to break the frictional bondso that the section of tubing is free to slide on the filament member again. When the section of tubing has been repositioned it can again be frictionally secured to the filament by the application of sufficient heat. The tubing may be heated by wrapping it in a metal foil and heating the foil with a match.

The invention has been described in an illustrative manner and it is to be understood that the terminology which has been used in intended to be in the nature of words of description rather than limitation.

Obviously many modifications and variations in the present invention are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the invented claims the invention may be practiced otherwise than as specifically described.

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. An archery bowsight assembly, comprising; support means adapted for attachment to an archery bow and including a length of filament and heat shrinkable tubing slidably disposed on said filament, said tubing being shrinkable in response to heat for frictionally engaging said filament.

2. An archery bowsight assembly as set forth in claim 1 wherein a plurality of sections of heat shrinkable tubing are disposed on said filament and said plurality of sections of said shrinkable tubing are of different lengths.

3. An archery bowsight assembly as set forth in claim 2 wherein said sections of heat shrinkable tubing have narrow annular bands encompassing said sections generally about the centers thereof.

4. An archery bowsight assembly as set forth in claim 3 wherein said filament has the configuration of an elongated loop.

5. An archery bow sight assembly as set forth in claim 4 wherein said support means includes an elongated guide member and a bracket slidably disposed on said elongated guide member.

6. An archery bow sight assembly as set forth in claim 5 wherein said filament has ends extending parallel to one another and laterally away from one side of the elongated loop and into said bracket.

7. An archery bowsight assembly as set forth in claim 1 wherein said filament has the configuration of an elongated loop. 

1. An archery bowsight assembly, comprising; support means adapted for attachment to an archery bow and including a length of filament and heat shrinkable tubing slidably disposed on said filament, said tubing being shrinkable in response to heat for frictionally engaging said filament.
 2. An archery bowsight assembly as set forth in claim 1 wherein a plurality of sections of heat shrinkable tubing are disposed on said filament and said plurality of sections of said shrinkable tubing are of different lengths.
 3. An archery bowsight assembly as set forth in claim 2 wherein said sections of heat shrinkable tubing have narrow annular bands encompassing said sections generally about the centers thereof.
 4. An archery bowsight assembly as set forth in claim 3 wherein said filament has the configuration of an elongated loop.
 5. An archery bow sight assembly as set forth in claim 4 wherein said support means includes an elongated guide member and a bracket slidably disposed on said elongated guide member.
 6. An archery bow sight assembly as set forth in claim 5 wherein said filament has ends extending parallel to one another and laterally away from one side of the elongated loop and into said bracket.
 7. An archery bowsight assembly as set forth in claim 1 wherein said filament has the configuration of an elongated loop. 